What rim should i use?

[VSouto]

Hello guys, sorry for my bad english, that isn't my first language.

My name is Vinícius, im new here.

The doubt is: I have a A3 1.8T 150hp 2001, the car is almost oem, just exhaust, cai, and a alcohol remap (fuel pump and nozzels include), what give to me about 180whp. Now a days the car uses 17 inchs + 225/45 tires, but i want to improve my acceleration with 15 inchs +195/55 tires.

What u guys think about that? Im afraid of lose much stability and confidence in the car in high speed, but at the same time, i dont think that my car needs the resistence of 17 wheels.

Please, give me your opinion and experiences.

 

[J.E]

Hello, Vinicius, how are you? Are you from Portugal? Brazil?

 

[VSouto]

Im fine, and u ? From Brazil

 

[J.E]

Im fine, and u ? From Brazil

Bom saber que eu não sou o único brasileiro do forum. Sou do Rio de Janeiro, de onde você é?

Poste aí umas fotos do carro, por favor.

 

[CrunchSlaughtered]

Hello guys, sorry for my bad english, that isn't my first language.

My name is Vinícius, im new here.

The doubt is: I have a A3 1.8T 150hp 2001, the car is almost oem, just exhaust, cai, and a alcohol remap (fuel pump and nozzels include), what give to me about 180whp. Now a days the car uses 17 inchs + 225/45 tires, but i want to improve my acceleration with 15 inchs +195/55 tires.

What u guys think about that? Im afraid of lose much stability and confidence in the car in high speed, but at the same time, i dont think that my car needs the resistence of 17 wheels.

Please, give me your opinion and experiences.

Not the resistance is the problem but the final drive ratio. Smaller outer diameter tires make the gears shorter and thus achieving better acceleration on the expense of maximum speed and fuel eficiency. For good acceleration is important the traction, the resistance is for the fuel economy. Putting skinnier tires will worsen the traction especially since the A3 is FWD. So for better acceleration are needed smaller outer diameter tires but wide enough for good traction.